How do I test if my controller has stick drift?

Your character walks on its own. The camera slowly pans when you are not touching anything. In a shooter, your aim creeps to the left just enough to lose the fight. You are not sure whether it is the game’s dead zone, the pad, or you.

Most of the ways to check are bad: a website that needs a PC and a browser gamepad API, a game’s own calibration screen that hides the numbers, or «rotate the stick and see if it feels right». None of them gives you a number you can compare next month.

And if you play through a stream, you have one more suspect: maybe the remote-play app is mangling the pad before the game ever sees it.

Stick drift is the potentiometer or sensor under the stick reporting a small offset when the stick is centred. Games hide small offsets behind a dead zone; when the drift grows past it, the input leaks through. Dust, wear and a loose spring all push the resting position off centre, and the offset tends to grow over time.

To know for sure you need to read the raw axis value at rest, over several seconds, and compare it with the dead zone the game applies. That needs a tool that talks to the pad directly, not through an emulation layer.

1. 01

   Plug the pad into your Android device

   USB into a phone, tablet or TV box running ChimpDeck (USB OTG is the only requirement). The tools work with no PC session at all.

2. 02

   Open Gamepad tools → drift and dead zone

   Let go of both sticks. The test shows the resting position of each stick, how far it wanders and whether that exceeds the dead zone, with a verdict in words — not just a colour.

3. 03

   Check the trigger curve

   Pull each trigger slowly: the curve shows whether it reads linearly and where its dead zone starts. A trigger that stops at 80 % is a pad fault, not a game setting.

4. 04

   Test the four rumble motors

   Left trigger, left body, right body, right trigger, one by one. A motor that never answers is broken, and over USB you would feel it in the game; over Bluetooth, rumble is coming soon.

5. 05

   Run the button tester and the reaction test

   The button tester shows every button and undocumented bits; the reaction test gives you a time in milliseconds to compare pads or check the wheel or arcade stick you use from the sofa.

6. 06

   Cross-check on the PC if you stream

   ChimpDeck for Windows has its own test bench: drift and circularity with a verdict, raw buttons and axes, and the distribution of intervals between controller reports over 60 seconds — median, p99, losses — so a stutter on the TV stream shows as a number.

• A verdict, not a feeling

  Drift and dead zone measured on the real pad with the result said in words.

• No PC needed

  The tools run on the phone or TV box with nothing else connected.

• Trigger curve, rumble, buttons, reaction

  The whole pad checked in one place, including undocumented bits.

• Link quality when you stream

  On the PC, the interval distribution with p99: the tail above p95 is what feels like a stutter, and it is shown, never averaged away.